DE102010062142B4 - Printing machine with a dryer system and method for operating a dryer of a printing material processing and / or processing printing press - Google Patents

Abstract

Printing machine with at least one printing unit (02) through which a printing substrate (11) on one or both sides one or more colors can be printed, and a dryer with a dryer (03), through which the substrate (11) feasible, and when passing to whose drying in the dryer interior can be brought into contact with hot dryer supply air, at least one first heat exchanger (16) being provided for heating the dryer supply, by which at least a part of the dryer supply air to be led into the dryer (03) on the cold side as supply air flow (14 ), and on the hot side in the heat exchanger (16) heat to the dryer to be heated donating, out of a dryer exhaust heating fluid is guided, characterized in that the dryer (03) at least one heating zone (36) and at least one to the heating zone (36) lying in the downstream direction of the Bedruckstoffweges cooling zone (37) that the cooling zone (37) via a n second dryer inlet (23) dryer inlet to a second temperature can be fed, which is lower than the temperature of the dryer supply of the at least one heating zone (36), and heated by the first heat exchanger (16) dryer supply a heating zone (36) of the dryer (03) is supplied, and that a Trocknerabluftstrom (39) from the cooling zone (37) is supplied in total or at least partially to the heat exchanger (16) as the supply air flow (14) or at least as part of the supply air flow (14).

Description

The invention relates to a printing machine with a dryer system and to a method for operating a dryer of a printing material which processes and / or processes a printing machine according to the preamble of claim 1 or 15.

By the EP 1 046 874 A2 a hot air dryer is known, wherein a heating zone, an evaporation zone, a cooling zone and a cooling / conditioning unit are provided. The hot air conducted into the dryer for drying the web exits from a burner unit in which the hot air is heated directly by a gas burner, wherein a portion of the combustion gas can be recirculated via a pipe within the burner unit. A heat exchanger here seems to serve the preheating of an air flow to be supplied to the burner. An internal or external drying of the laden exhaust gas can optionally be provided.

The WO 2009/155889 A1 relates to a dryer for drying one or more in a printing process printed and / or coated paper web, wherein the paper web is brought to the drying with a hot drying gas in contact. As the drying gas, the exhaust gases of an internal combustion engine upstream of the drying plant is used at least in part. Several dryers are supplied in parallel with the exhaust gas of the internal combustion engine as a drying gas. Parallel to the dryers, a part of the exhaust gas is fed to a absorption refrigeration machine via a control and regulation unit, which in turn provides cooling for heat exchangers for oil recovery and / or for cooling other press-specific machines or air conditioning. Part of the exhaust air from the oil recovery can instead of being discharged into the environment cooled to 20-30 ° C, and be guided as a support and / or sealing gas in the dryer back.

By the EP 1 953 489 A1 is a dynamic heat storage and a method for storing heat known. The hot storage is connected in parallel in a closed media circuit between a heat source and a heat consumer as energy storage. It has a plurality of chambers, which can be flowed through by the medium both to its Belaung with heat and for discharge. The chambers are connected by a dome in the upper, hot area, have openings with flaps in the lower, cold area. They are preferably filled with ceramic honeycomb blocks for heat storage. The guided through the heat storage to the loading medium is returned to the heat source, where it is heated again.

The EP 2 213 939 A2 discloses an oxidation plant for exhaust gas purification and a method for its operation. The oxidation system has a plurality of chambers, which are each carried out in the interior with a heat bed and open at an upper end all in a combustion chamber with a gas burner. Hydrocarbons introduced into a hot chamber to be cleaned exhaust air is z. B. partially oxidized already in the chamber and finally in the combustion chamber and finally discharged through another chamber to the heating of the environment. After Umtaktung and possibly intermediate flushing the Abgasfuhrung through the chambers then take place in the next cycle in the reverse direction.

KBA-MetalPrint's brochure "CleanAir exhaust air cleaning systems" sets out different emission control systems, one of which involves a combination of a thermal exhaust air purification unit with several heat-chamber chambers connected via a combustion chamber and an upstream concentration stage.

The DE 101 23 489 B4 discloses a device for cooling a material web, wherein waste heat of a hot air dryer is used for evaporative cooling of a cooling medium, by means of which a web cooling the cooling roller is cooled.

The DE 10 2008 042 122 A1 relates to a thermal drying device for drying a printing material, wherein the supply air stream to be supplied to the dryer is preheated by a heater first in a preheating exchange device by a flow from a cooling device before heating by a heater.

By the DE 298 19 202 U1 For example, an apparatus for drying and cooling a freshly printed web is known, wherein thermal energy of a dryer-derived exhaust air stream is used in an absorption chiller to obtain cooling capacity for a cooler downstream of the dryer.

The DE 200 08 740 U1 relates to a hot-air drying device, wherein dryer air is heated via a heat exchanger by waste heat of a blown air compressor unit.

By the DE 10 2004 040 131 A1 discloses a drying of webs with integrated catalytic combustion of pollutants, wherein the dryer exhaust air is heated in countercurrent to the purified exhaust air, then in cocurrent to a combustion gas and finally by direct mixing with the combustion gas.

By the DE 33 24 130 A1 For example, a method and apparatus for drying printed webs is known wherein a liquid heated by a refrigerator serves to preheat combustion air for a heater fan of the dryer.

The EP 1 515 103 A2 relates to a dryer device in a production line for the production of aluminum plates with light-sensitive coating or optionally for the production of photographic or video material, which serially has four dryer stages, wherein in the first three stages heated fresh air or a heated mixture of fresh air and circulated from this zone exhaust air is fed as a dryer supply. A fourth stage can also be operated as a heating stage, or as a cooling stage, wherein in the second case outside air is cooled by cooling water and used as supply air.

The invention has for its object to provide a printing machine with a dryer system and a method for operating a dryer of a printing and / or processing printing machine.

The object is achieved by the features of claim 1 and 15, respectively.

The achievable with the present invention consist in particular in that the indirectly heated dryer is particularly well regulated and / or can use as a heat sink in an overall system resulting heat and / or - in contrast to the dryer internal afterburning - allows at least partial recovery of hydrocarbons. By running as at least partially indirectly heated dryer is given by the heat source in certain areas independent and better control option. By varying the heat input, the flow rate essential to the stability of the web can be maintained, i. H. Heat input and volume flow can be decoupled. In particular, this is advantageous in connection with a heat storage. In this embodiment can not be used for the dryer heating and / or possibly additionally used in addition to this unloaded heating means for heat storage. Further advantages are mentioned in detail in connection with the following explanations and developments.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

1 a schematic diagram of an overall system of a printing press or printing press system with an exemplary representation of a variety of predictable aggregates, ancillaries and energy and fluid flows,

2 a schematic diagram of an overall system of a printing press or printing press system with exemplary representation of a variety of predictable aggregates, ancillaries and energy and fluid flows in a variant with additional steam generator;

3 an execution of a dryer system with indirect heating;

4 an embodiment for the design and / or heating of a dryer outlet opening;

5 Embodiments of energy transfer means for indirect dryer heating with parallel (a) and serial (b) heating fluid supply;

6 a detailed, primarily a supply of energy related excerpt from an overall system 1 with exemplary representation of a variety of predictable aggregates, ancillaries, customers and consumers, energy and fluid flow;

7 an embodiment of a heat accumulator in spatial (a) and side view (b);

8th a detailed, primarily a conditioning of the exhaust gases leaving the dryer relating to a total system 1 with an exemplary representation of a variety of predictable aggregates, ancillaries, customers or consumers, energy and fluid flows,

9 an embodiment of a printing press system included in the overall system with several commercial printing press lines;

10 an embodiment of a printing press contained in the overall system or printing press system with multiple printing towers.

A material processing and / or processing machine 01 , in particular a substrate 11 processing and / or processing printing press 01 or multiple printing press lines having printing press system 01 (which is also referred to below as "printing press") has several units and / or process or process stages. The as a printing press 01 trained machine 01 has z. B. at least one printing unit 02 on, through which a substrate 11 , in particular a substrate web, one or both sides one or more colors can be printed. Furthermore, it has z. B. at least one dryer 03 on, by which the printing material is supported after printing in its drying process. It may have other energy consuming aggregates, such as. B. one of the printing unit 02 upstream printing material feed (eg as a roll changer), and / or a feed mechanism, further the printing material 11 transporting traction units and / or a dryer 03 downstream processing stage 04 , of which in the figures, only the latter exemplified as another consumer, for. B. as a cutting device and / or as a folder 04 , is indicated. The aggregates 02 ; 03 ; 04 or process steps carried out there is to supply energy in the form of electrical E _e or thermal energy in the form of heat E _W and / or thermal energy to withdraw possibly for temperature control, which is abbreviated here as supply of cold E _{K is} shown , The provision of heat E _W or cooling E _K again requires electrical energy E _e and / or the conversion of energy E _B contained in fuels (such as gas, coal, oil, etc.). Furthermore, the printing press 01 leaving media streams and / or the printing press leaving product still exergy, ie lead energy at a potential which is increased over that of the normal conditions (environmental conditions), such. Pressure, temperature, kinetic, chemical energy.

As consumers of electrical energy E _e , for example, drives, z. As motors, in as printing units 02 or as a folder 04 etc. trained units 02 ; 03 , optionally by electric energy-powered dryer (eg radiation or IR dryer), and for example, not explicitly shown heaters for controlling the temperature and / or preheating of components or media streams, pumps, fans, actuators etc. As consumers of thermal energy in the form of heat E _W are particularly through a hot fluid flowed dryer 03 , z. B. hot air dryer 03 , particularly relevant, wherein the fluid is to be heated, for example, directly or indirectly by fuel or otherwise. A conventional method of providing the substrate 11 Cooperating hot gas is the direct use of the hot exhaust gas of a gas burner, which, for example, structurally directly on the dryer 03 is provided. In the figures is a schematic of the dryer 03 separately shown aggregate 09 as a heat source 09 , in view of the only indirect connection to the printing process itself z. B. as an accessory 09 designated, provided by which for the dryer 04 required heating energy is provided. The accessory 09 may in principle be provided as a burner or hot steam generator, but is preferably as a power-heat aggregate 09 , z. B. as an internal combustion engine 09 educated. A trained only as a burner accessory 09 could be structurally dry in a conventional manner or on the dryer 03 be provided integrated. On the other hand transported z. B. a Trocknerabluftstrom 15 as a hot air dryer 03 trained drier 03 in its residual heat, a considerable thermal energy potential, which would be previously applied as waste energy in the case of unused emission to the environment.

Finally, the printing press 01 In addition to the printing process directly concerned aggregates 02 ; 03 ; 04 and the accessory 09 other, also energy in different form consuming aggregates 05 ; 06 ; 07 ; 08 , in view of the merely indirect connection to the printing process itself z. B. as ancillaries 05 ; 06 ; 07 ; 08 designated, assigned, such as a heating unit 05 (eg building heating 05 and / or steam generators 05 ), a refrigeration unit 06 (eg chiller 06 , in particular absorption chiller 06 ) for providing cold for to be cooled or tempered components of z. B. printing units 02 or other aggregates and / or for room air conditioning. Furthermore, as ancillaries 07 ; 08 also energy consuming conditioning 07 ; 08 be provided by which contaminated process media, eg. As exhaust air or wastewater, conditioned and freed of their pollutant load. Consuming energy here is also the need for cold E _k to grasp, which is only to generate energy expenditure.

An overall system 12 a printing press 01 or printing press system 01 with the printing process aggregates 02 ; 03 ; 04 and the printing press 01 or printing press system 01 sibling ancillaries 06 ; 07 ; 08 ; 09 is thus at least to supply energy in the form of electrical energy E _e and / or in the form of fuel E _b from the outside in order to operate the units and ancillaries accordingly. An energetically and / or environmentally relevant process stage is the drying of the printed substrate in the dryer 03 and associated with this process stage ancillary processes, which z. As concerns the process control, the provision of hot air and the treatment of the exhaust air. Also of energetic importance is - if any - the production of cold. Through the combined heat and power unit 09 can also be generally, or in certain operating states electrical energy E _e to the outside, ie in the public network fed.

Below is a particularly advantageous embodiment of a dryer system, and then the inclusion of a dryer 03 , in particular the preferred dryer system, in an energy supply and / or -mangagementsystem, in which, depending on consumption and use of energy different form recovered and / or stored and / or moved to reduce the consumption of total energy, in particular to optimize.

The amount of in the dryer 03 Energy required per unit of time is highly dependent on the operating situation of the printing press 01 ie the current production speed and the currently produced print product. For example, at higher production speeds, increased dryer performance is needed than at low speed. Also the characteristics and properties of the currently used substrate 11 (eg paper or foil as material, surface condition and / or treatment, paper type) and / or the substrate width (eg web width), the substrate thickness, the amount of ink to be dried (image density) and - in the case of wet offset - The dampening solution guide can influence and cause fluctuations in the power requirement. On the other hand, excessive drying out of the printing material can lead to damage (eg cracks or waves, etc.), resulting in a dryer that is basically over-dimensioned for safety reasons 03 In addition to the energy consumption also involves quality technical disadvantages. The dryer system described below solves this problem by the dryer heating the varying conditions in the overall system 12 can follow from an energetic point of view, an optimization in the overall system can be achieved.

This is achieved here, for example, by the fact that the dryer 03 is not directly applied to a high-energy exhaust or exhaust air flow of a preceding process or the exhaust gas of a gas burner. Instead, here is dryer supply before entering the dryer 03 (or from the substrate 11 passed through inside the dryer) indirectly heated or heated by heat exchange by the dryer inlet initially in a supply air 14 ; 19 a heat exchanger 16 is fed there, heated by indirect thermal contact with a heating fluid, and the so-heated or heated dryer supply air in a dryer 18 ; 23 as hot or dryer air in the dryer 03 to be led. After being heated in the heat exchanger, therefore, the dryer supply air is not heated by a combustion process, as is the case with direct drying, but merely by heat exchange with a heating fluid.

The heating fluid of the in the heat exchanger 16 ; 21 on the so-called "hot" side entering hot Heizfluidzustroms 17 ; 22 contains in a first embodiment - at least partially - a gaseous or liquid fluid in the overall system 12 arising exergiereichen media stream 13 high temperature (eg T13 ≥ 150 °, in particular ≥ 250 °, preferably ≥ 350 °) as Heizfluidstrom 13 ( 13.1 ). In particular, contains the Heizfluidzustroms 17 ; 22 or is formed by z. B. abgezufuhrende process fluid, or exhaust or exhaust air of an exhaust or exhaust air stream 13 an aggregate or accessory of the printing press 01 or the entire system 12 , an otherwise incurred and existing process heat carrying fluid flow, such. B. a waste heat at high temperature dissipating process heat flow, a stream of a system already existing or generated steam and / or by an energy storage 24 , in particular heat storage 24 , heated or heated fluid flow 26 , z. B. hot air stream 26 , The dryer supply air to be heated is in this case directly by the media flow 13 heated. The heating is done indirectly by not the media flow 13 itself, but is fed by this heated dryer air.

In an alternative embodiment is between the hot media stream 13 dispensing aggregate or accessory and the entry into the heat exchanger 16 ; 21 the dryer system at least one further heat exchanger 20 provided, which via appropriate fluid lines on the hot side a above-mentioned hot media stream 13 (from a source and / or condition mentioned above for the first variant) can be supplied. The dryer air to be heated is here indirectly, ie via a further fluid flow and a further heat exchange, by the media flow 13 heated. Here, the heating of the dryer takes place 03 again not by the media stream 13 directly, but in the result indirectly. Through the heat exchanger 20 becomes one on the "cold" side of the heat exchanger 20 befindliches and / or the heat exchanger 20 on the input side of the cold side in a fluid flow 30 (eg all or most of the water 30 or an aqueous fluid) supplied by indirect thermal contact with the hot media stream 13 heated or is heated. At least part of the "cold" side of the heat exchanger 20 In this embodiment, heated fluid leaving via a corresponding fluid line forms at least part of the fluid flow in the heating fluid 17 ; 22 the at least one heat exchanger 16 ; 21 the Trocknersystems supplied during drying operation Heizfluids. Preferably, in this alternative embodiment, the heat exchanger 20 as a steam generator 20 formed, which on the hot side by the hot media flow 13 ( 13.1 ) is heated, and in which on the "cold" side by heating a liquid, preferably an aqueous liquid, in particular largely predominantly water (≥ 90%), steam is recovered. This is or is at least partially for heating the at least one heat exchanger 16 ; 21 of the dryer system this or this heat exchanger (s) 16 ; 21 supplied via corresponding fluid lines. The or the heat exchangers 16 ; 21 the dryer system is or are then preferably designed as a steam / gas heat exchanger.

The operation described below and the design of the dryer system 03 . 55 is in each case corresponding to the execution of the in the dryer system in Heizfluidzustrom 17 ; 22 to apply incoming heating fluid. This Heizfluidzustrom 17 ; 22 can then in the first variant directly, ie without interposition of another heat exchanger 20 , an effluent (eg exhaust gas flow 13 ; 13.1 or another outgoing process fluid) from the dryer 03 various aggregates / ancillaries ( 09 ), or in the second variant one by an outflow, z. B. the exhaust stream 13 ; 13.1 or another process fluid from the dryer 03 various aggregates / ancillaries in the heat exchanger 20 heated heating fluid, z. As steam, include or be formed thereby.

Preferably, the temperature and / or the flow rate of the dryer 03 to leading dryer influx 18 ; 23 controllable and / or controllable. An energy transfer in the heat exchanger 16 ; 21 of the dryer system, and thus the temperature of the dryer supply in the dryer inlet 18 ; 23 , is preferably via a control and / or regulation of the volume flow on the "hot side" of the heat exchanger 16 . 21 , ie the volume flow through the heat exchanger 16 ; 21 guided heating fluid, controlled and / or regulated. This can be done by controlling and / or regulating the volume flow of the heating fluid before or after the relevant heat exchanger 16 ; 21 , ie in Heizfluidzustrom 17 ; 22 or in Heizfluidabstrom 25 , respectively.

A preferred dryer system thus has at least the hot air dryer 03 and at least one heat exchanger 16 on, by which dryer supply at least a first in the dryer 03 to conductive dryer influx 18 is indirectly heated. The heat exchange takes place here under separation of the heat exchanging media, ie in the heat exchanger 16 to be heated dryer inlet ("cold side" of the heat exchanger 16 ; 21 ) and the heat-emitting heating fluid ("hot side" of the heat exchanger 16 ; 21 ), instead of. That in the heat exchanger 16 ( 21 ) on the hot side entering heating fluid, as stated above, in the first variant exhaust or exhaust air of an aggregate or auxiliary unit (eg., Power-heat generator 09 ), an otherwise incurred and existing process heat bearing fluid flow, already existing or generated in the system steam and / or by a thermal energy storage 24 Discharge warmed air or even consist entirely of it. In the second variant, this steam comprises or is formed therefrom, which via an intermediate heat exchanger 20 is formed (see above)

In the (first) heat exchanger 16 becomes the (first) in the heat exchanger 16 incoming supply air 14 heated to a temperature T18 of, for example, 100 ° C to 300 ° C, preferably 150 ° C to 290 ° C and as a (first) dryer influx 18 the dryer 03 fed. The feed in the dryer 03 itself is preferably done in a known manner, not to be described in detail. The one in a dryer influx 18 guided dryer supply is through appropriate piping in the dryer 03 guided and on a variety of the effluent to drying desiccant outlets, z. As nozzles distributed. Such outlets or nozzles can be provided on both sides of the printing material, wherein the expression and thus the nature and strength of the power supply for lower and upper outlets can be quite different.

The energy supply through the heat exchanger 16 ( 21 ) in the dryer supply is preferably by means of an actuator 27 ( 48 ), z. B. a volume flow influencing actuator 27 ( 48 ) (eg a flap), depending on the temperature T18 in the dryer feed 18 or one in the dryer 03 through a corresponding sensor 28 measured temperature T1 or a temperature T11 of the printing substrate 11 (eg measured inside the dryer by a corresponding sensor, eg one on the substrate 11 directed IR sensor) controlled and / or regulated or controlled and / or regulated. The temperature measurement of one of these temperatures to be used T18; T1; T11 and the actuator 27 form a control loop, by which the temperature T18, T1; T11 can be controlled to a manually or in particular by a controller predetermined target temperature. The controller can in this case data on the current operating status of the printing press 01 and / or the dryer 03 and automatically determine the target temperature to be prescribed to the control loop according to specified rules.

It can also be a bypass 29 be provided, over which the dryer 03 bypassing the heat exchanger 16 Dryer supply can be fed. The bypass 29 preferably opens into the line of the dryer inlet 18 so that through this the dryer 03 optionally through the heat exchanger 16 guided, or the heat exchanger 16 immediate supply air can be supplied. For this example, in front of the heat exchanger 16 in the supply air stream 14 and in the bypass 29 actuators 31 ; 32 intended. Through this is -. B. in the event that an extension of the control range and / or faster reaction times is desirable - for example, a distribution between the quantities simultaneously by heat exchangers 16 and bypass 29 guided supply air adjustable. Also for an execution of the dryer system with or without a closed bypass 29 is about the preferred in the supply air stream 14 arranged actuator 31 the volume flow of the supply air adjustable.

The dryer 03 has an entrance side 33 and an exit side 34 for the substrate to be dried 11 on. The dryer feed from the (first) dryer feed described above 18 is preferably in at least a portion of the dryer 03 guided and via the corresponding outlets or nozzles with the substrate 11 brought into contact, which in terms of the transport path of the printing material through the dryer 03 in a first half of the dryer 03 lies. Preferably, a region near the outlet side is in the dryer 03 provided, in which none through the (first) heat exchanger 16 heated dryer inlet flows through outlets into the dryer interior. The in the dryer 03 introduced supply air is via at least one dryer exhaust air stream 15 ( 39 ), z. B. main exhaust stream 15 taken from. This is preferably done by a in the dryer exhaust air stream 15 ( 39 ) provided blower 44 ( 41 ), z. B. exhaust fan 4 , which preferably sucks in the air from the dryer interior and delivers in the event of a pollutant limits compliant exhaust air quality as exhaust air to the environment, otherwise a conditioning described in more detail below 07 . 09 ; 10 zufuhrt.

Preferably, the dryer has 03 with regard to the transport path of the printing material through the dryer 03 successively several areas 36 ; 37 , z. For example zones 36 ; 37 , on, in which the printing substrate 11 with dryer supply different temperature T36, T37 can be filtered by appropriate outlets. The dryer 03 has this z. B. at least a first zone 36 , z. B. a drying zone 36 on, in which dryer supply a first temperature T36, z. B. in dry operation at least 150 ° C, preferably at least 200 ° C, is fed through the outlets provided there. In at least one second, with respect to the Bedruckstoffweges downstream zone 37 , z. B. cooling zone 37 , Dryer supply air is supplied to a second temperature T37 through the outlets or nozzles provided there, which in dry operation of the dryer 03 advantageously significantly lower, z. B. at least 50 ° C lower and / or highest temperature T37 of z. B. 130 ° C, preferably at most 100 ° C having, as the temperature T36 of the at least one first zone 36 , The zones 36 ; 37 can only by the supply of supply air of different temperature 36 ; 37 to be marked. In an advantageous embodiment, however, is at least between the or a last of the first zones 36 and the first one of the second zones 37 a narrowing 38 the adjacent free cross-section in the dryer interior, z. B. a wall 38 with preferably slot-shaped Durchtriffsoffnung for the substrate 11 , provided so that both sides of the constriction 38 zones 36 ; 37 train in kind of chambers. In each case several first zones 36 may in a common such chamber or in several, each also by constrictions 38 be provided separate chambers. The same applies in the case of several second zones 37 , In the case of several first and / or several second zones 36 ; 37 Close all first zones 36 each other from the entry side 33 her and all second zones 37 each other from the exit side 34 at least at one point of the dryer 03 a first of a second zone 36 ; 37 is adjacent.

The dryer exhaust air flow 15 (or in the case of several dryer exhaust air streams 15 ; 39 the main exhaust air stream) takes the dryer inside the exhaust air in the area of the drying zone (s) 36 , preferably in a region of the drying zone 36 or in one of several drying zones 36 whichever or the first or only cooling zone 36 is closer than to a preferably slot-shaped inlet opening 35 for the entry of the printing material 11 in the dryer 03 ,

In the embodiment of the dryer system with at least one heat exchanger 16 is through this at least one heat exchanger 16 hot supply air for one or more heating zones 36 provided. Indicates the dryer 03 in addition to one or more hot supply air from the heat exchanger 16 supplied heating zones 36 one or more cooling zones 37 on, so can this cooling zone 37 (or these cooling zones 37 ) a dryer influx 23 be assigned, through which the dryer supply to one with respect to the temperature T36 for the heating zone 36 lower temperature T37 is supplied or is.

In a less expensive solution, this dryer flow can 23 ( 19 ) as Tocknerzuluft fresh air taken directly from the environment (ambient temperature) or exhaust air or exhaust gas medium temperature (eg 40 ° to 100 °) in the overall system 12 contained or formed be located process or suction. This fresh air or exhaust air or exhaust gas is in this case directly, ie without entering the dryer 03 be charged with additional energy, if necessary via corresponding outlets or nozzles in the cooling zone (s) 37 guided (ie without passing through a heat exchanger). Through this dryer feed the previously through the dryer zone (s) 36 heated substrate 11 cooled, the dryer supply absorbs the energy and is heated. In device-technically simple execution, the now heated dryer supply air of the cooling zone (s) 37 in a dryer exhaust stream 39 discharged and discharged in the event of a pollutant limits compliant exhaust air quality as exhaust air to the environment, otherwise a conditioning described below closer 07 ; 08 . 10 be supplied. Also can be dryer-internal for this dryer exhaust air flow 39 an afterburner may be provided under, for example, a gas burner. Preferably, the dryer exhaust air stream 39 through a fan 41 sucked out of the dryer interior to produce at least a slight negative pressure in the dryer or at least an excess pressure in the dryer 03 to avoid. In this way it is ensured that at the output end of the dryer 03 No polluted air through the for the printing material 11 provided, preferably slot-shaped outlet opening 42 exits, but possibly fresh air from the environment in the dryer if necessary 03 enters, like this through with 43 indicated arrows is indicated in the figures.

Preferably, the dryer exhaust air stream 39 with the already heated and / or possibly a pollutant load leading dryer exhaust air of the cooling zone (s) 37 all or at least partially the heat exchanger 16 as supply air flow 14 or at least as part of the supply airflow 14 fed. This can, for example, on the here z. B. as a support blower 41 trained blowers 41 respectively. The already preheated and / or loaded with a pollutant load dryer exhaust air from the cooling zone 37 is subsequently in the supply air flow 14 of the heat exchanger 16 guided, by the heat exchange in the heat exchanger 16 further heated and finally over the dryer influx 18 via the corresponding outlets of the drying zone or one of the drying zones 36 fed. About the above control loop 27 . 28 , T1; T18; T11 and / or bypass 29 For example, the temperature and / or the volume flows can be controlled and / or regulated as described above.

In a training, part of the heat exchanger 16 heated and by the dryer influx 18 into the drying zone (s) 36 discharged dryer supply - instead of the dryer exhaust air stream 15 to be discharged - quasi taken as a recirculating air flow to the dryer interior and as a dryer exhaust partial flow through a bypass 46 again the supply air flow 14 for the heat exchanger 16 be fed. The return of such a dryer exhaust partial stream can, independently of the conversion of a transfer of one of the cooling zone (s) 37 removed dryer exhaust stream 39 directly into the supply air stream 14 or, if provided, together with exhaust air of a removed from the cooling area dryer exhaust air flow 39 respectively. The circulating air flow through the bypass 46 can z. B. via an actuator 47 switched on and off and if necessary with respect to the amount controlled or regulated.

In a particularly advantageous embodiment of the dryer system is - using the above-mentioned versions Genantem - next to the heat exchanger 16 as a primary heat exchanger 16 another heat exchanger 21 as a secondary heat exchanger 21 provided by which the into the cooling zone (s) 37 Dryer inlet to be introduced with separation of the heat-exchanging media, ie in the heat exchanger 21 to be heated dryer inlet ("cold side" of the heat exchanger 21 ) and the heat-emitting heating fluid ("hot side" of the heat exchanger 21 ), can be heated or heated. In the area of the cooling zone (s) 37 To be introduced dryer inlet is this purpose before entering the dryer 03 in a supply air stream 19 the heat exchanger 21 fed, heated there by indirect thermal contact with a heating fluid or heated, and the thus heated or heated dryer supply air in the dryer 23 in the dryer 03 guided. The heating fluid of the in the heat exchanger 21 on the so-called "hot" side entering hot Heizfluidzustroms 22 contains z. B. also here - at least partially - a gaseous or liquid fluid in the overall system 12 accumulating media stream 13 a temperature of at least 20 ° C, in particular at least 40 ° C, preferably at least 80 ° C, above ambient temperature. This Heizfluidzustrom 22 may also preferably exhaust or exhaust air of an exhaust or exhaust air flow 13 an aggregate or accessory of the printing press 01 or the entire system 12 , an otherwise incurred and existing process heat bearing fluid flow, a stream of a system already existing or generated steam and / or an energy storage 24 , in particular hot storage, heated or heated air flow 26 contain or be formed from this. The supply air flow 19 As in the preceding exemplary embodiment, fresh air taken directly from the environment or else exhaust air or exhaust gas of average temperature in the overall system 12 contained process or a suction or be formed thereby, in which case the temperature in the case of exhaust air or exhaust gas comparatively lower than in the latter example, for. B. also from 40 to 80 ° C, can be.

In an advantageous embodiment, the Heizfluidzustrom 22 by gaseous or liquid fluid from the Heizfluidstromes 13 of the same origin as the Heizfluidzustrom fed 17 of the above, here the primary heat exchanger 16 performing heat exchanger 16 , Should, however, in the overall system 12 a further media stream are available, the at least a temperature of z. B. greater than 80 ° C, advantageously greater 110 ° C, so may instead of the media stream 13 for preheating the cooling zone (s) 37 To be introduced Trockrocknerzufluft also fluid this compared z. B. "colder" media stream can be provided as a heating fluid in the secondary heat exchanger or. In this version of the dryer system, the dryer supply air discharged into the dryer interior should have a Temperature of 70 to 110 ° C, preferably 80 to 100 ° C, exhibit.

Preferably, the temperature and / or the flow rate of the dryer 03 to leading dryer influx 23 controllable and / or controllable. An energy transfer in the heat exchanger 21 , and thus the temperature of the dryer supply air in the dryer 23 , is preferably via a control and / or regulation of the volume flow on the "hot side" of the heat exchanger 21 , ie the volume flow through the heat exchanger 21 guided heating fluid, controllable and / or regulated. In principle, however, this can be done by controlling and / or regulating the volume flow of the heating fluid before or after the heat exchanger 21 , ie in Heizfluidzustrom 22 or in Heizfluidabstrom 45 , respectively. This control or regulation is particularly in the case of use of heating fluid high temperatures, eg. B. T13 ≥ 150 ° C advantageous, which, for example, when feeding the secondary heat exchanger 21 and the primary heat exchanger 16 by fluid from the same media stream 13 can be caused. Will in this case the supply air 19 no added cold air, so at least a reduction in the volume flow, a lower temperature for the dryer inlet 23 be set. As already mentioned above for the primary heat exchanger 16 is explained, is preferably also for the dryer influx 23 the cooling area for control or regulation provided a comparable control loop. The energy supply through the heat exchanger 21 in the dryer supply is preferably by means of a setting song 48 , z. B. a volume flow influencing actuator 48 (eg, a flap), depending on the temperature T23 in the dryer feed 23 or one in the dryer 03 through a corresponding sensor 49 measured temperature T2 controllable and / or controlled or controlled and / or regulated. The temperature measurement of one of these temperatures to be used T23; T2 and the actuator 48 form a control loop, by which the temperature T23, T2 considered here is adjustable to a target temperature manually or in particular by a controller. The controller can in this case data on the current operating status of the printing press 01 and / or the dryer 03 and automatically determine the target temperature to be prescribed to the control loop according to specified rules. The control and / or regulating algorithm of the energy input through the primary heat exchanger 16 associated control loop and the control and / or control algorithm of the energy input through the secondary heat exchanger 21 associated control loop can be provided in a common control.

In the latter, particularly advantageous example, the indirect heating of the dryer takes place 03 at least in dry operation (ie during production) thus using two heat exchangers 16 . 21 which - as regards the fluid flow - over the dryer interior, in particular a cooling zone 37 of the dryer 03 , are connected in series. The energy input into the heat exchangers 16 ; 21 can be done in principle by fluid of different or the same origin. About the primary heat exchanger 16 will be at least one drying zone 36 , via the secondary heat exchanger 21 at least one cooling zone 37 of the dryer 03 supplied with supply air, wherein at least a part of at least one cooling zone 37 of the dryer 03 to be discharged dryer exhaust stream 39 at least one component of the in the primary heat exchanger 16 incoming supply air flow 14 forms. The dryer supply air formed by fresh air or exhaust air / exhaust gas medium temperature is first in the secondary heat exchanger 21 on z. B. 80 to 100 ° C, preferably about 90 ° C (± 5 ° C) prewarmed. For this purpose, the energy supply z. B. by means of the actuator 48 on the hot side of the secondary heat exchanger 21 regulated as a function of actual temperature (T2, T23) and target temperature. The supply air then flows in the area of the cooling zone (s) 37 of the dryer 03 by forced or free flow in the area of the dryer exhaust air stream 39 where they are by the blower 41 from the cooling zone 37 out and, possibly together with a Trocknerabluftteilstrom, to the primary heat exchanger 16 is encouraged. A regulation of the optionally provided dryer exhaust air flow can be dependent on the required negative pressure conditions in the dryer 03 respectively.

In the primary heat exchanger 16 is the dryer supply of z. B. 100 to 140 ° C, preferably about 120 ° C (± 5 ° C), in the supply air stream 14 on z. B. 200 to 300 ° C, preferably 250 to 290 ° C, heated and the hot or the drying zone (s) 36 fed. For this purpose, the energy supply z. B. via the actuator 27 on the hot side of the primary heat exchanger 21 as a function of the actual temperature (T1, T18, T11) and the target temperature.

If the machine is at a standstill (eg production changeover, etc.), the primary heat exchanger becomes 16 z. B. in stand-by mode, ie without heat transfer to the dryer supply operated. For this purpose, the z. B. at least partially from the cooling zone 37 originating dryer supply with appropriate adjustment of the actuators 31 ; 32 over the bypass 29 at the primary heat exchanger 16 over and directly to the dryer 03 guided. This stand-by mode enables the desired dryer temperature to be available in the shortest possible time when starting up.

The through the dryer exhaust air stream 15 from the dryer 03 discharged dryer exhaust air is preferably in the range of the last of several, or in a last third of a continuous drying zone 36 aspirated. Preferably, the exhaust air here in the dryer exhaust air flow 15 by not shown sensors with respect to a pollutant load, in particular hinsichlich at least the cargo of hydrocarbons and / or solvents, concentration monitored.

By appropriate dimensioning and / or control of the fan 44 and / or the blower 41 can the appropriate supply air flow through the two heat exchangers 16 ; 21 be adjusted and guaranteed.

Indirect heating of at least the drying zone (s) 36 certain dryer supply via at least one heat exchanger 16 and / or in particular by the control possibility created thereby can now on the one hand a heating of the dryer 03 regardless of the type of media stream available 13 regulated. On the other hand, it is possible to use the media stream used for this purpose 13 without absorption of contaminants following the transfer of energy in the heat exchanger 16 ; 21 and / or in parallel thereto or during a temporary stoppage of the machine 01 or stand-by mode of the dryer 03 instead of another use, eg. B. a temperature memory 24 to feed.

In an advantageous development of the stated indirect dryer heating, it may be in the region of the outlet opening 42 of the dryer 03 be provided, also through the heat exchanger 21 Blow in preheated supply air. For this purpose, for example, from the heat exchanger 21 downstream dryer inlet 23 a partial flow 51 branched off and via corresponding lines in the region of the outlet opening 42 guided and there as a prewarmed sealing air 53 in the exit opening 42 on both sides of the substrate 11 between wall and substrate 11 blown. This can be counteracted particularly effective a possible condensation of oils at the dryer outlet. The effect can be further increased if, instead of a frontal outlet opening 42 in the dryer 03 on the exit side 34 bounding wall an outlet tunnel 52 is provided. This lengthens in the transport direction of the printing material 11 the area of the tapered free cross-section of the outlet opening 42 , Due to the prevailing negative pressure in the cooling zone 37 is through the outlet opening 42 "Fresh air" with ambient temperature sucked into the dryer. This relatively cool air is now with the preheated blocking air in the outlet tunnel 52 mixed, so that a possible condensation of the oils in the area close to the exit of the (last) cooling zone 37 prevented or at least reduced. Preferably, the blowing of the preheated sealing air takes place 53 in the outlet tunnel 52 against the transport direction of the printing material 11 through appropriately aligned outlets or nozzles. This results in a leakage of the dryer air through the preferably slot-shaped outlet opening 42 counteracted.

As the heat exchangers 16 ; 21 in the present case not necessarily close to the dryer zone (s) 36 ; 37 having exhibiting drying tunnel including the Dusenmimik causing the flow is here for the dryer system between the component having the drying tunnel as a "dryer" 03 on the one hand and the energy exchange with the media stream 13 discriminating on the other hand. The dryer system, as used herein, thus on the one hand the dryer 03 with the zones 36 ; 37 Having dryer interior or dryer tunnel, with the integrated tuyeres or outlets and the corresponding dryer inside piping and possibly with a built-in dryer housing combustion chamber with burner and possibly heat exchanger for afterburning the dryer exhaust air 39 on. On the other hand, the dryer system has the at least one or both not necessarily provided within a dryer housing or not necessarily directly adjacent heat exchanger 16 ; 21 on. The latter are here conceptual and in the figures together with their actuators as energy transfer means with the reference numeral 55 However, although the parts described below, each individually or in groups spatially decentralized or summarized all compact, remote and structurally separate from the dryer 03 , directly on the dryer 03 or even within a common dryer cover can be arranged. Under certain circumstances, which structurally can be justified in the building of the printing house, the heat exchange near the power-heat aggregate 09 , in other cases close to the dryer 03 be appropriate. The piping for the fluid streams is then adjusted accordingly.

The dryer 03 is due to the indirect heating via a heat exchanger 16 ; 21 thus, within certain limits, thus basically independent of an energy supplying unit for the drying 09 operable and vice versa, provided that the aggregate 09 z. B. provides at least the heat needed for drying. Both for power and / or heat-providing as well as for power and / or heat consuming processes, the respective efficiency is often dependent on the operating point of the process and therefore can be deviated from a -. B. depending on the design of the relevant unit - optimal operating point significantly decrease. The applied energy is in this case partly not used for the process result but goes z. B. in residues for use or otherwise lost as anergy.

The indirectly heated and / or in terms of energy consumption in the above limits regardless of the providing aggregate 09 adjustable dryer system is preferably integrated into an energy supply and / or management system, which includes aggregates from the printing process and ancillary equipment as energy sources and sinks. Starting from the dryer system on one side downstream of the dryer system is the dryer 03 leaving, next to z. B. to be removed pollutants at least exergy in thermal and / or chemically bonded form and / or possibly raw materials containing dryer exhaust 15 (see below) and / or the heat exchanger (s) 16 ; 21 leaving exergiereiche Heizfluidabstrom 25 to make usable.

For the following fluid flows, although not explicitly mentioned at the relevant point and / or for reasons of clarity in the figures not shown in addition to the fluid flow, corresponding fluid lines, in particular piping, between the respectively connected by the fluid streams processes, customers, consumers, Aggregates and ancillaries or supply lines to these provided. Advantageously, an actuator for controlling and / or regulating the fluid flow can be provided in the process, customer, consumer, aggregate or auxiliary fluid supplying fluid line or the corresponding fluid input into the process, the customer, the consumer, the unit or the auxiliary unit.

Upstream of the dryer system is the supply of the dryer 03 Preferably with heat to design such that the heat generation can be operated with constant high efficiency, but power losses in the heat demand loss energy is minimized relative to the overall system. As the process heat for the dryer 03 providing aggregate 09 Here is preferably a combined heat and power unit 09 , in particular an internal combustion engine 09 such as a gas turbine or a gas engine used, the hot exhaust gas, if necessary, if necessary, additionally heated by a nozzle burner, in the hot medium flow 13 at least predominantly the heat energy for the dryer 03 or the above-mentioned drying system provides. In addition, in addition to this, hot energy flows from other processes or ambient air besides the exhaust gas in the medium flow can also be used 13 be initiated. The combined heat and power unit 09 However, it provides a stable and largely constant energy flow in the form of heat, for example, in a narrow work area z. B. maximum, but at least high efficiency is operated. The temperature T13 of Heizfluidstromes 13 is preferably at least 150 ° and is in the case of the exhaust gas flow of the combined heat and power unit 09 formed or at least predominantly formed by this Heizfluidstromes 13 advantageously between 300 and 800 ° C, preferably between 300 and 500 ° C. In the event that the power-heat aggregate 09 is designed as a high-temperature gas turbine, for example, with the additional possibility of a steam injection, the upper limit for the above ranges for the temperature T13 of Heizfluidstromes 13 be extended to up to 1000 ° C.

In addition to the heat, electrical energy is generated with equally largely constant power, which can be found at various points in the overall system and / or any excesses stored or the surpluses or total electrical energy can be delivered to the public network even beyond the balance limit of the overall system , This charge from the system would be negative for the consumption of the entire system.

In the above variant of a between cogeneration unit 09 and dryer system provided, in particular as a steam generator 20 trained heat exchanger 20 , and the formation of the combined heat and power unit 09 as a gas turbine 09 is in an advantageous embodiment, a fluid line 40 between the steam-providing output side of the heat exchanger 20 and the gas turbine 09 provided over which of the gas turbine 09 If necessary, to increase the electrical power to be generated steam is fed or is fed.

The combined heat and power unit 09 is z. B. designed so that it in his preferred operating point or area a particular, z. B. to be determined in the planning proportion of the maximum through the dryer 03 (and possibly other processes to be supplied with heat) required heat output covers. This proportion to be determined may be dependent on whether and in which amount other heat flows which constantly accumulate in the overall system are also used, if and if so to what extent back-up systems, eg. As support burners, etc., are provided for peak performance, and if and in what amount, if necessary, other processes in addition to the dryer 03 with heat from the combined heat and power unit 09 to be supplied. For example, is alone the combined heat and power unit 09 to supply only the dryer 03 provided with heat, so the operating point or range to a share of, for example, about 100% (possibly plus a small safety margin of eg 2 to 10%) of the maximum for the dryer 03 required heat energy (plus line and heat exchange losses) to settle. Irrespective of the amount of the more or less fixed portion, however, there are regular operating situations of the printing press 01 or the dryer 03 in which not the full Warm power is called or even a production interruption, the demand temporarily completely reduced to zero. Followed now the power-heat aggregate 09 In the operational management of this fluctuating demand, so operating phases with particularly poor efficiencies and possibly due to suboptimal process management higher wear or contamination may be the result.

In order to counteract these disadvantages, preference is now given to the possibility of thermal coupling of the exhaust gas of the combined heat and power unit 09 containing media stream 13 to at least one other customer 05 . 06 and / or memory 24 thermal energy, next to the dryer 03 as a customer 03 to provide. As another customer 05 ; 06 Preferably, a process or an aggregate or ancillary unit carrying out this process can be coupled, the heat requirement of which, at least in a base load, is not strictly related to the operational management of the printing press 01 but is either largely independent of the current operating situation or at least of the short-phase fluctuations during the operating layer of the printing press, or the demand on the process product provided by the heat-reducing process correlates, but the process product - at least on the order of the short-phase operating fluctuations corresponding periods (eg up to 0.5 hours) - can be stored without significant losses (stored thermal thermal or cooling energy, for example, less than 10% of the Exergieinhaltes).

Examples of such customers are here in heating units 05 and / or refrigeration machines having thermal compressors 06 to see. A heating unit 05 which, for example, heat for a building heating 54 as a consumer 54 can provide a base load of heat demand in the winter months, depending on the amount of surplus heat from the combined heat and power unit 09 save the use of other primary energy to be used. The same applies in the summer months for a thermal energy consuming refrigeration unit 06 which as a consumer 58 a building air conditioning 58 supplied with cold. If both are provided for the above-mentioned thermal coupling, this base load resulting from heating and cooling of the building for the possible decrease only lapses for short transitional periods in autumn and spring. Regardless of the season, a heating unit can act as a consumer of excess heat 05 be coupled, which as a consumer 56 of heat z. B. a steam generator 56 supplied for the provision of process steam, the steam, for example, to meet the above-mentioned short-phase consumption fluctuations in a - possibly correspondingly isolated - memory, for. B. pressure tank, is cached or is. As another or another consumer 57 of heat can pass through the or another heatable aggregate 05 a z. B. preheating component 57 (or a tempering device arranged therebetween).

As cold technical seasons independent pontoon for steam generation or preheating can be a thermal coupling with a cold aggregate 06 for providing refrigerants for cold consuming consumers 58 . 59 . 61 ; 62 , z. B. in process stages or units or ancillaries 02 ; 07 , respectively. Again, the refrigerant, for example, to meet the above-mentioned short-phase consumption fluctuations in turn be cached in a - possibly correspondingly isolated - memory or be. Such process cold, for example, a component to be tempered 59 a printing unit 02 as a consumer 59 (or a tempering device arranged therebetween) and / or a cooling device acting coolingly together with the printing material 61 (eg chill roll stands) as consumers 61 and / or as a heat exchanger 62 trained consumer 62 z. B. a conditioning stage 07 for condensing out a pollutant and / or recyclable material from a process fluid, as z. B. the dryer exhaust stream 15 represents.

The media stream 13 can in addition to the coupling to the dryer 03 thermally to one or more heating units 05 for one or more consumers 54 ; 56 . 57 ; 74 from heat (or directly to consumers 54 ; 56 ; 57 ; 74 ), or to one or more refrigeration units 06 for one or more of the above consumers 58 ; 59 ; 61 ; 62 from cold, or to one or more heating units 05 as well as one or more refrigeration units 06 be thermally coupled in the above sense. It can also be a heating unit 05 optionally or simultaneously several of said consumers in question 54 ; 56 ; 57 ; 74 with heat, or a refrigeration unit 06 optionally or simultaneously several of the said relevant consumers 58 ; 59 . 61 ; 62 provide with cold. However, individual heating or cooling units can also 05 . 06 for individual consumers 54 ; 56 ; 57 ; 74 ; 58 . 59 ; 61 ; 62 be provided. Are, as preferably provided, several different heating or cooling units 05 ; 06 as a customer 05 ; 06 and / or multiple consumers 54 ; 56 ; 57 ; 74 ; 58 ; 59 ; 61 ; 62 directly or indirectly to the media stream 13 Coupled, the susceptibility to individual consumption fluctuations on the customer side is cushioned, so that the likelihood of under-capacity use of the surplus heat of the media stream 13 is reduced. For this purpose, for example, in an advantageous embodiment variant next to the dryer 03 at least one heating unit 05 and at least one cooling unit 06 to the media stream 13 thermally coupled, wherein z. On at least one of the two customers 05 ; 06 different type at least one seasonal consumer 56 ; 57 ; 74 ; 59 . 61 ; 62 is integrated.

In another advantageous embodiment, at least one heating unit 05 to the media stream 13 provided thermally coupled, wherein one or more coupled heating units 05 two different consumers 54 ; 56 . 57 ; 74 supply or supply, wherein preferably at least one of the consumers 56 ; 57 ; 74 is seasons independent in the above sense. In a further advantageous embodiment variant, one or more cooling units 06 provided thermally coupled to the media stream, wherein by the at least one Kuhlaggregat 06 two different consumers 58 ; 59 ; 61 ; 62 (Cold consumer) supplied with cold, again preferably at least one of the consumers 59 ; 61 ; 62 is seasons independent in the above sense. The latter two variants are to be executed as a particularly variable embodiment variants at the same time.

That with the media stream 13 thermally coupled heating unit 05 may be formed here in each case or in each case only as a heat exchanger, which on its "hot side" thermally directly or indirectly with the media stream 13 can be coupled, and flows on the "cold side" the process medium of the consumer to be supplied itself or a heat only transporting, and downstream of the heat via another heat exchanger to the consumer dispensing fluid. On the other hand, for the units or consumers requiring refrigeration, an execution limited only to a heat exchange is ruled out, but, in addition to the introduction of heat, further stages of the process are known to be required.

The examples given in the individual consumers 54 ; 56 ; 57 ; 74 ; 58 ; 59 ; 61 ; 62 or processes by the coupling to the thermal energy of the media stream 13 Saved input of energy is not consumed at this level in the form of primary energy sources (fuel) or electrical power. However, it may be useful in an advantageous embodiment, in addition to the thermal coupling possibility to the media stream 13 the relevant heating or cooling unit 05 . 06 and / or the consumer himself a conventional means for heat input, z. As an additional heating to assign the conversion of fuel and / or electrical energy needed for the process heat. This can be done with only one compared to the required maximum power designed reduced capacity of the respective heating or cooling agent in the manner of a partial backup in the case of only partial power, or as a full backup designed with the maximum power requirement capacity.

The Z. B. at least one, thermally to the media stream 13 Coupled cooling unit 06 is as already mentioned, preferably as an absorption chiller 06 , ie formed on the basis of thermal compression. In such an embodiment, to provide the cold (in contrast to the compression refrigeration machine), waste heat from process streams can be used, which is located at a temperature level which is above the evaporation temperature prevailing in the expeller under the present process conditions. This minimum temperature depends on the media mixture used and may for example be 150 to 200 ° C. for an ammonia-water absorption refrigeration system. For several consumers 58 ; 59 ; 61 ; 62 or groups of consumers 58 ; 59 ; 61 ; 62 can be a common or several of these absorption chillers 06 be provided.

In principle, fluid of Heizfluidstroms 13 from the heat source 09 via a corresponding line system to the customer (s) 05 . 06 (or directly to consumers 54 ; 56 ; 57 of heat) directly, ie without further conversion, heat exchange or storage processes, are fed. This is shared for example at one of the heat source 09 downstream branch point 63 the line leading the fluid into at least two branches, one of which, in the case of direct heating, directly to the dryer 03 or in the preferred case, indirect dryer heating to the heat exchanger (s) 16 ; 21 the dryer 03 associated energy transfer agent 55 or in the case of a steam generator upstream of the dryer system 20 leads to this. At least one other branch leads to the at least one customer 05 ; 06 or directly to a heat consuming consumer 54 ; 56 ; 57 , The branch point 63 can at least one controllable and / or controllable actuator, z. B. one or more adjustable flaps, be assigned, through which a deliberate distribution of Heizfluidstromes 13 in Heizfluidteilstrome 13.1 ; 13.2 is adjustable. Such a flap can this example, in the customer 05 ; 06 or consumers 54 ; 56 ; 57 be provided leading line branch. Basically, such an additional flap for the case of or with respect to the volume flow adjustable heat exchanger 16 ; 21 or in the case of a steam generator 20 account for adjustable on the hot side volume flow, so that the ratio of the partial flows 13.1 ; 13.2 about the decrease through the heat exchanger 16 ; 21 self-employed. For safety and / or avoidance of interference, however, such a flap may additionally be provided.

Depending on the decrease in energy through the dryer 13 or the dryer system is a more or less large amount of heating fluid or thermal energy from the Heizfluidstrom 13 for the use of waste heat by the customer (s) 05 ; 06 or consumer available. If, for example, during a production interruption no or very little energy and thus no or very little heating fluid needed, is the entire or approximately total amount of heating fluid from the Heizfluidstrom 13 from the heat source 09 to supply the customers 05 . 06 (or consumer 54 ; 56 . 57 ; 58 . 59 . 61 ; 62 ) to disposal. Will the dryer 03 however, operated at full load, which minimizes for those for the / the customers 05 . 06 (or consumer 54 ; 56 . 57 ; 58 ; 59 ; 61 ; 62 ) usable waste heat quantity.

Shall consumers 54 ; 56 ; 57 . 58 . 59 ; 61 . 62 be supplied directly or indirectly, whose decrease in heat or cold correlates with the production, the in-phase coupled to the production operation of the dryer 03 and the consumer 54 ; 56 ; 57 ; 58 ; 59 ; 61 ; 62 to an excess of unused heat in shorter periods of interruption, in which a shutdown of the power-heat generator 09 is uneconomical and / or harmful, and bottlenecks and possibly strong Zusatzbeheitzung on the consumer or customer side at full load. The latter could only by larger sizing of the power-heat unit 09 avoid, but in its operation in the optimal working area ultimately leads to increased loss at partial load operation of the printing press or production interruptions.

In a particularly advantageous embodiment is in the line branch, to the or the customers 05 ; 06 or consumers 54 ; 56 ; 57 leads, as already indicated above, a heat storage 24 , in particular a high-temperature hot storage 24 , provided, in which the Heizfluidteilstrom 13.2 - in whole or in part - as a hot load 13.2 (For example, at a temperature of 300 to 800 ° C, in particular 300 to 500 ° C, or in the case of a high-temperature gas turbine even up to 1000 ° C) is introduced. In the event that the dryer 03 during a break no heat needed, the "Heizfluidteilstrom" 13.2 the entire Heizfluidstrom 13 to lead. In the hot storage 24 itself or around it may preferably be a bypass line for a Heizfluidbypassstrom 13.2b be provided, through which through all or part of the Heizfluidteilstroms 13.2 ( 13 ) the way through in the hot storage 24 provided storage means 64 can be bypassed. This is z. B. then expedient, if one of the guided through the bypass amount of heating fluid corresponding amount of heat required by the docking customers / consumers currently or at least makes sense.

The heating fluid bypass flow 13.2b can in a mode or operating situation (complete heat loss) the entire Heizfluidteilstrom 13.2 ( 13 ) lead, in a second mode of operation or operating situation (heat surplus mixing operation) only a portion of the Heizfluidteilstrom 13.2 ( 13 ), the other part being the memory 24 is supplied or is. In a third operating mode or operating situation (no direct consumption by consumer storage operation) is or is the entire Heizfluidteilstrom 13.2 ( 13 ) in the memory 24 guided whereby the bypass leads no heating fluid.

In the event that a heating of the dryer 03 through that in the store 24 heated fluid is to be provided, the Entladeabstrom 26 as a hot fluid stream 26 in the case of direct heating on the input side of the dryer 03 itself, and in the case of indirect heating on the input side of the at least one heat exchangers 16 ; 21 (or input side of the energy transfer agent 55 ) be supplied. The feed to the input side of the dryer 03 or the heat exchanger 16 ; 21 can either by a specially designed line or by the partial flow 13.2 between branching point 63 and memory 24 already provided line, but done in the reverse flow direction.

In a further variant of previous embodiments, it may be provided that for heating the dryer 03 from the store 24 the discharge outflow 26 as a hot fluid stream 26 in the case of indirect heating, the heat exchanger (s) 16 ; 21 in the above-mentioned operation reverse operation ("reverse operation") with reverse flow direction of the heating fluid in the heat exchanger 16 ; 21 is supplied or is. In the variant with steam generator 20 the latter can by the discharge current 26 be heated. It can also be provided that the dryer 03 in one mode of operation while the power-heat engine is running 09 through the media stream 13 , and now in the event of interruption now from the memory 24 , z. Via the branch office 63 continues to be heated indirectly or even directly in "forward mode" or in the "reverse mode" mentioned above.

In an embodiment in which the dryer 03 z. B. in the above manner indirectly heated, the or the heat exchanger 16 ; 21 leaving Heizfluidabstrom 25 or / and the steam generator 20 (if provided) leaving Heizfluidabstrom 25 ' in addition to or instead of from the branching point 63 resulting heating fluid to the memory 24 and / or by-pass. Although this can basically while saving the Verzeigung at the Verzeigungsstelle 63 be provided with regard to a regulation of the dryer 03 without the operation of the heat source 09 However, in the case of using the Heizfluidabstroms is to influence 25 the possibility of parallel guidance preferred.

Such a high-temperature storage 24 can basically as a discontinuous working memory 24 be trained and / or operated, with a "loading" and a "unloading" is not at the same time, but in successive steps. Thus, for example, in an operating phase of the entire system, in which when operated combined heat and power unit 09 the printing operation is interrupted and thus also the dryer 03 in standby mode there is no or almost no energy for the dryer 03 needed. The heating fluid flow 13 is essentially performed in the other leg, where he either completely in the memory 24 can be performed, or a required part on the Heizfluidbypassstrom 13.2b directly to the customer (s) and the heating fluid partial stream 13.2a as a load inflow 13.2a in the store 24 to be led. This can be at a partial load operation of the printing press 01 and the dryer 03 to be done in a sensible way. At least during production interruption, during standby or possibly in partial load operation of the printing press 01 can waste heat from the heat source 09 , here the combined heat and power unit 09 the store 24 be fed and stored there. The through the storage means 64 of the memory 24 to its charge guided load inflow 13.2 ; 13.2a leaves the store 24 at a reduced temperature in a Speicherladeabstrom 66 as storage exhaust. These now by giving energy to the store 24 cooled exhaust air is now discharged directly or if necessary via an exhaust gas purification stage to the environment, or supplied to a further use of heat lower temperature levels. When performing the hot heating fluid, the memory 24 "Loaded" by the memory 24 provided storage means 64 is heated by medium or direct thermal contact with the heating fluid. The or at least part of the storage means 64 is heated to a temperature that depends on the temperature of the heating fluid asymptotically approaches the loading time of the incoming heating fluid.

This after loading in the store 24 capacitively stored heat can now in case of need the memory 24 withdrawn and used elsewhere. This is the memory 24 a fluid, e.g. B. ambient air or an already warmed process gas or process exhaust air, as Entladezustrom 67 fed. This is in direct or indirect thermal contact with the hot storage medium 64 brought and heated thereby. Depending on the status of the overall system and, if necessary, resulting requirements, this can be the memory 24 leaving heated fluid now one or more customers / consumers 05 ; 06 ; 54 ; 56 ; 57 and / or the dryer 03 or dryer system to be supplied. The delivery to one or more customers / consumers 05 ; 06 ; 54 ; 56 ; 57 takes place via a discharge discharge 65 , which - possibly combined with a Heizfluidbypassstrom 13.2b - the customer (s) 05 . 06 ; 54 ; 56 ; 57 is supplied. In a mode of operation, for example, that of the heat source 09 provided partial flow is insufficient, one or more customers / consumers 05 ; 06 ; 54 ; 56 ; 57 Warm both directly from the heat source 09 and in parallel from the memory 24 be fed forth.

The heat storage 24 has, for example, one or more, z. B. four, memory elements 68 , z. B. chambers 68 on, which or which of a fluid from a defined input side to a defined output side can be flowed through or are. In the case of a multi-chamber construction, ie with a plurality of such memory elements 68 , These may be cuboid in their base and arranged in close arrangement to each other. A plurality of chambers 68 may be advantageous if z. For example, the possibility of energy shifts within the memory 24 and / or the possibility of partial loading or partial unloading of the total capacity should be given. Is a plurality of such, together the heat storage 24 forming containers 68 provided, so their interiors on a same page -. B. at the respective upper or lower end - with a same space 69 , z. B. an overhead dome 69 , keep in touch. The (respective) memory element 68 , z. B. in the manner of a container 68 is formed internally with a high-temperature resistant (eg up to at least 800 ° C., in particular at least up to 1000 ° C.) and / or preferably refractory and / or inert material (eg with a heat capacity, eg c _p ≥ 0.6 J / (g · K) and / or thermal conductivity λ ≥ 0.8 W / (m · K)), which is essentially the storage means 64 for the absorption and release of heat forms. As such material can in principle z. B. any kind of rock, natural stone or stone form. Preferably, however, the material is formed as a ceramic material. The type of filling with this material should on the one hand ensure a flow (without too high pressure losses), on the other hand have a large coming into contact with the fluid flowing through surface. This can be achieved by loose fillings on the one hand, preferably equipped with mold elements consisting of the material, which forms a substantially defined arrangement and structure of flow channels in the container interior. Preferably, the filling is formed by mold elements which form a honeycomb body system.

On one side of the chamber 68 or the chambers 68 , preferably in the region of the lower end, are inlet and outlet openings (depending on the flow direction), each with individually operable butterfly valves 75 provided, which z. B. in the case of a multi-chamber system can be connected by pipes with a common supply and discharge. This page preferably represents the "cold" side of the heat accumulator 24 dar. In a region of this page opposite side, z. B. in the area of the top (eg., "Hot" side of the memory 24 ) are the chambers 68 z. B. by the common dome 69 interconnected at the bottom by the above-mentioned flaps separated or separable. The flaps can preferably with a drive, for. As an electro-pneumatic drive, and advantageously be designed with a limit monitoring.

In the storage room 24 are provided for monitoring the temperatures of the ceramic filling, the loading flow and / or the discharge flow temperature sensor. The temperature sensors in the ceramic filling are z. B. to display the temperature and to determine the energy content ("thermal level") of the memory 24 used in a control device. In addition, each chamber 68 have a sensor for monitoring the pressure loss.

Preferably, at the beginning of a storage process, the agitation of a still cold heat storage takes place 24 (or a still cold chamber 68 ) by controlling along a ramp ramp along a controlled temperature rise to prevent overheating of the material, particularly the honeycomb ceramic, and local overheating and / or overshoot.

A loading of the store 24 takes place by supplying a particular of the heat source 09 resulting hot load inflow 13 . 13.2 . 13.a , The feed takes place here from the "hot" side, here about z. B. the common dome 69 , In the multi-chamber system, the incoming load flow is divided 13 ; 13.2 ; 13.a z. B. unregulated on the majority of chambers 68 , In principle, in the area of the hot side, a defined division of the Beladeluft on the individual chambers 69 be provided over flaps corresponding to the cold side.

That's hot, z. B. a temperature T13 of z. B. 300 to 800 ° C (optionally up to 1000 ° C bie high temperature gas turbine), preferably 300 to 500 ° C, in particular 350 to 400 ° C, having heating fluid, in particular exhaust gas of the heat source, combined heat and power unit 09 , flows over the chamber (s) 69 of the memory 24 and this gives heat energy to the ceramic heat storage mass, ie the storage means 64 , from. The heating fluid is thereby cooled to a lower temperature level while the storage means are heated accordingly strong. An outflow of the heating fluid as Beladeabstrom 66 Finally, on the "cold" side, z. B. by the open butterfly valves. Loading only a part of chambers 69 In the multi-chamber system can be done by flaps at the output of individual chambers 69 stay locked, so through these chambers 69 no fluid flow flows. This can be advantageous if currently only little power to be stored is available and therefore only a part of the memory within a limited period of time 24 to be loaded to a working temperature. At the end of a loading process is now one or more with heat energy at a sufficiently high temperature level, for. B. at least 250 °, preferably at least 300 °, at least at the hot end of the loaded chambers 69 available, which can be supplied at a heat demand on a discharge of a use.

Discharging takes place from the "cold" side via a discharge flow 67 which may comprise air from the environment (so-called "fresh air") and / or low or medium temperature exhaust air already heated above the environment. In the multi-chamber system, a defined division of the discharge flow 67 to one or more chambers 68 depending on the energy requirement over the flaps selectable. The cold fluid flows through the chambers 68 of the memory 24 and takes this in the filler, z. As the ceramic material, contained heat energy. The cold fluid, z. B. cold air, is thereby heated to a higher temperature level and the filler cooled accordingly The delivery of the heated fluid in a discharge outflow 65 takes place on the hot side, here for example over the common dome 69 , From here it can be for one or more customers 03 ; 05 ; 06 or a distraught person 54 ; 56 ; 57 ; 58 ; 59 ; 61 ; 62 be provided in the above-described manner, either selectively or in parallel.

In the case of a multi-chamber system can be used in addition to the supply and discharge piping 71 the chambers 68 connecting pipes 72 with a fan 73 or fan 73 be provided by which heat through corresponding fluid flows from one to the other chamber 68 is relocatable.

The memory 24 is preferably a control device, for. As memory control, assigned by which based on previously defined parameters automatic operation of the memory 24 (Control / regulation of fluid flows and temperatures, control of damper actuators) is feasible. For example, there may be interfaces to the printing machine control, which is available to the memory control operating data of the printing press and possibly in the near future planning data for the operation and needs of the printing press. Input to the memory controller preferably find temperature data and / or data on the volume flow of Heizfluidstroms 13 and, if necessary, demand data and / or status data of customers thermally coupled on the output side 03 ; 05 ; 06 or a distraught person 54 ; 56 ; 57 ; 58 ; 59 ; 61 ; 62 , Due to the automation - but preferably with manual intervention - simple and safe operation is possible. All required control and control parameters (eg operating set temperature, above temperature / volume data, etc.) are z. B. set during commissioning, but if necessary via a user interface anderbar.

The information about at least current storage temperatures and / or the data for the hot discharge outflow 65 (Volume flow, temperature) are z. B. to a control room of the printing press or printing press system 01 delivered. The operation of the memory 24 can be connected via a process visualization associated with memory control, e.g. As a touch screen, panel). The memory controller can also be designed as part of a controller, which at the same time also at least one further unit or auxiliary unit of the overall system, in particular a Konditionierstufe 07 ; 08 ; 10 , assigned. The memory controller can be used for data transmission with superordinate or sibling controls of the entire system in a local network, eg. B. Ethernet, the printing press 01 or printing press system 01 to be involved.

By the execution of the entire system with the heat storage 24 is thus an overall efficient provision of heat for heating the dryer 03 and created electrical energy, with a constant optimum operation of the power-heat engine 09 ensured by a decrease fluctuations cushioned storage of excess heat. Entrance side of the dryer 03 - As far as the main energy flows - is thus z. B. the provision of heat and electrical energy with a particularly high efficiency by power-heat coupling, in particular a gas turbine or a gas engine, and the supply of excess heat to a heat storage 24 and / or heat-consuming customers 03 ; 05 ; 06 or a distraught person 54 . 56 ; 57 . 58 ; 59 . 61 ; 62 or staggered again to the dryer 03 ,

On the output side of the dryer 03 leaves this with the substrate 11 In contact with dryer air in the dryer exhaust air flow 15 on the one hand still can have a significantly above ambient temperature T15 and thus a considerable Exergieinhalt, and on the other hand by drying the ink with a load of hydrocarbons or hydrocarbon compounds, eg. As volatile and / or nonvolatile oils and / or solvents (in short: hydrocarbons), laden, on the one hand - at least the non-volatile at ambient conditions - a potential for reclaiming raw materials or raw material mixtures as a valuable material, and on the other hand as a carrier chemically bound energy represents a potential for use as fuel. Depending on the target direction in the overall system, emphasis may now be placed on recycling of valuable materials or else on minimization of energy, whereby a concept to be settled between these extremes may also be particularly advantageous.

Is alone or at least predominantly the recycling of material from the dryer exhaust air stream 15 given the priority, so are the ingredients to be recovered, the concentration of which decreases from process step to process step, with relatively ever-increasing effort, even in terms of energy, from the dryer exhaust stream 15 ; 15.1 ; 15.2 ; 15.3 finally, after intensive recovery in a suitably trained conditioning stage 07 in the dryer exhaust gas stream 15.1 remaining amounts due to the then low concentration possibly with the use of primary energy sources, eg. B. by gas firing, must be removed before the release to the environment.

Preferably, in the overall system is a dryer exhaust air treatment 07 ; 08 . 10 , in short an exhaust air treatment 07 . 08 . 10 , integrated, which either without or at least with a minimum of primary energy supply, and / or used for exhaust air purification at least partially traceable back into the overall system and makes usable. The latter can by heat storage in its own, the exhaust gas cleaning attributable heat recovery unit or heat storage, or - if provided in an advantageous embodiment in the overall system - combined with the above-mentioned heat storage 24 for storage of excess heat coming from the cogeneration of heat and power.

In a first embodiment, the treatment of the dryer exhaust air flow takes place 15 ; 15.1 without upstream of a recovery by purely thermal means. The dryer exhaust stream 15 ( 15.1 ; 15.2 ) is via a pipeline 76 from the dryer 03 discharged and directly (without intermediate process stage) as a thermal exhaust air purification stage 10 trained conditioning device 10 zugefuhrt, in which the im Dryer exhaust air stream 15 contained hydrocarbons are oxidized. For the oxidation of hydrocarbons, a burner 83 , z. B. be provided a gas burner. Preferably, the thermal exhaust air purification stage 10 However, formed in the manner of regenerative, so that on the one hand, the released during the oxidation thermal energy and / or in the exhaust gas through the burner 83 introduced energy remains at least to a large extent in the system. By an embodiment described below, the stored energy for subsequent gas to be oxidized in the system can be obtained, so that only little Zufeuerung must be made or -. B. in the case of high hydrocarbon cargo - even an autothermal oxidation process can take place.

The exhaust air purification stage 10 has at least two, z. B. three chambers 78 ; 79 . 81 which are each designed, for example, in the form of containers and are internally coated with a high-temperature resistant (eg up to at least 800 ° C., in particular at least 1000 ° C.) and / or preferably refractory and / or inert material (preferably high heat capacity). is filled. Preferably, the material is a ceramic material. This material forms in each case a through-flowable thermal bed. The heat bed can be equipped either by loose fillings, but preferably with mold elements consisting of the material, which forms a substantially defined arrangement and structure of flow channels in the container interior. Preferably, the filling is formed by mold elements which form a honeycomb body system. The chambers 78 ; 79 ; 81 each have openings in the region of two opposite sides and can be flowed through in either direction between the two openings.

The at least two chambers 78 ; 79 ; 81 stand over openings on the same side - z. B. at the respective upper end - with a same space 82 , z. B. an overhead dome 82 , and therefore in connection with each other. This room 82 can u. U. also be designed only as a pipeline. In this room 82 is, for example, at least one mouth of a burner 83 , z. B. gas burner 83 , provided by which at least in startup phases a system heating can be supported. Possibly. After heating the system, the heating system can be dispensed with and the oxidation can proceed autothermally.

On the room 82 opposite side of the chambers 78 ; 79 ; 81 are each flaps 85 , z. As raw gas flaps, provided, which with each other and with a common pipe 84 , z. B. crude gas pipeline 84 , keep in touch. In the first embodiment variant, the crude gas pipeline is 84 , if necessary via a fan 87 with the pipe leading out of the dryer 76 without the interposition of further process stages in connection. In addition, on the room 82 Opposite side of the chambers 78 ; 79 ; 81 each flaps 85 , z. B. clean gas flaps, provided, which with each other and with a common pipe 86 , z. B. clean gas pipeline 86 , keep in touch. Through the crude gas pipeline 84 if necessary with the assistance of a fan 87 , the dryer waste air stream to be cleaned 15 ( 15.1 ; 15.2 ) depending on the setting of the clean and raw gas flaps, one or more chambers 78 ; 79 ; 81 fed. Depending on the position of the raw and clean gas flaps, the clean gas pipeline is used 86 the purified exhaust gas via a chimney to the environment, or via the correspondingly guided clean gas pipeline 86 Piping a heat storage ( 24 ) and / or directly to a consumer - z. B. in the case of a below-described concentration of these as a heat source (see below) - fed.

The exhaust air purification stage 10 is started manually, externally or via a programmable timer. At the start of operation, the system is using the burner 83 heated. By control measures, the cooling of the system at standstill - by, for example, rearrangements of the heat contents - may have been minimized before, and the restart of the system after a shutdown in a reduced time previously done. Is a predefinable required setpoint temperature in the room 82 , z. B. combustion chamber space 82 , reached, then becomes one of the raw gas flaps of the chambers 78 ; 79 ; 81 open. The raw gas is then via the corresponding raw gas flap of a chamber 78 . 79 ; 81 fed. This initially flowed through chamber 78 ; 79 ; 81 acts as a heat exchanger in which the raw gas -. B. already almost to the combustion chamber temperature - preheated ("raw gas heat exchanger"). This finds z. B. already on the ceramic material of the heat bed, a pre-reaction (partial oxidation) of the pollutants or hydrocarbons instead. The complete oxidation (in CO2 and water) then takes place in the combustion chamber space 82 , if necessary with Zufeuern by the at least one burner 83 ,

The reaction is exothermic, d. H. In the implementation heat energy is released and the exhaust air heats up according to the calorific value of the pollutant load (hydrocarbon concentration) in addition. Preferably, via a temperature control, the burner power is automatically, for. B. stepless, regulated. D. h., With increasing combustion chamber temperature or exhaust gas temperature burner power can be reduced, and in extreme cases even completely adjusted. From a certain solvent concentration in the exhaust air, the released heat of combustion can be sufficient to maintain the operating temperature. off and the burner is switched off completely ("autothermal operation").

The hot clean gas flows from the combustion chamber space 82 now over a second chamber 78 . 79 ; 81 ("Pure gas heat exchanger") and this gives off a large proportion of the heat energy contained in the ceramic material of the hot bed. The clean gas is thereby cooled accordingly, the ceramic material heated. The clean gas cooled to a lower temperature level now leaves the exhaust air purification stage via the corresponding clean gas damper 10 and is either the environment, or a heat exchanger ( 24 ). The hot clean gas can also have two chambers 78 ; 79 ; 81 flow back and heat them up.

As the service life progresses, the chamber operating as a raw gas heat exchanger cools 78 ; 79 ; 81 by the incoming raw gas (which, for example, has a lower temperature than the hot side of the chamber, which is at operating temperature, from, and one or more chamber (s), which flows through in the reverse flow as pure-gas heat exchanger 78 ; 79 ; 81 heat up. Is a defined or defindierbarer operating point reached, at which a switch to another chamber 78 ; 79 ; 91 should take place as a raw gas heat exchanger, the crude gas by appropriate control of the clean and Rohgasklappen now another chamber 78 ; 79 ; 81 fed. It may be advantageous if the exhaust air purification stage 10 three chambers 78 ; 79 ; 81 has, and the previously operated as raw gas heat exchanger chamber 78 ; 79 ; 81 not operated directly after the clean gas heat exchanger, but is first rinsed. As aufzuheizender clean air heat exchanger is then in this case, first, a third chamber 78 ; 79 ; 81 operated and heated.

At the time of switching the raw gas flow from the first chamber 78 ; 79 ; 81 on another chamber is in the first chamber 78 . 79 ; 81 still a crude gas residual volume, which is preferably rinsed before this chamber 78 ; 79 ; 81 in a next cycle is operated as clean gas heat exchanger. This residual volume is in a winding process in the third chamber 78 . 79 ; 81 sucked in and in the combustion chamber space 82 cleaned. As a result, the clean gas values can be kept constantly low. After rinsing, this chamber becomes 78 ; 79 . 91 now instead of or parallel to the third chamber 78 ; 79 ; 91 operated as clean gas heat exchanger, so that it heats up again to operating temperature.

The described regenerative heat exchange process is thus a batch process, i. H. the exhaust air volume flow is cyclically indexed and the respective heat exchanger previously heated by the hot clean gas is used in a next or at least subsequent cycle for heating the cold raw gas. A programmable controller controls the reaction cycles in accordance with the respective operating conditions, thus achieving extremely high efficiencies and lowest operating costs.

The extracted air is z. B. by means of speed control of the fan 87 automatically and steplessly to the exhaust air stream to be delivered in the preceding process, eg. B. Dryer exhaust stream 15 ( 15.1 ; 15.2 ), customized. This can be done for example by a vacuum control in the crude gas line

If substances with a low condensation point are present in the raw gas, there is a risk that the heating beds of the chambers 78 ; 79 ; 81 increasingly in the area of the cold end and finally block. It can be provided in an advantageous embodiment, an operating mode ("burn-out"), in which the chambers 78 ; 79 ; 81 be cleaned automatically one after the other by heating them to a sufficiently high temperature (≤ 450 ° C) for a defined time so that the condensates evaporate again and then in the combustion chamber space 82 be oxidized. The process of the "burn-out" process takes place z. B. in several temperature stages, depending on the composition of the condensed hydrocarbons and z. B. off-line - ie if no raw gas is cleaned - carried out.

In the burner system can be used to control the at least one burner 83 Preferably, a burner control can be provided, which takes into account a varying power requirement. Typical gas burner systems have a predetermined power range in which they work. However, if the hydrocarbon concentration is in the range of the autothermal point, then a minimum performance of a typical gas burner system z. B. higher than the actual required power, ie it is then supplied more gas than required. In the preferred embodiment of the burner control system, if the minimum load is permanently undershot, the burner will become burnt 83 operated in a so-called. Injection mode: The flame is then turned off and it is clocked only as much gas supplied via the burner port, as is necessary to maintain the combustion chamber temperature. As a result, the control range of 0-100% is extended and in the injection mode, the combustion air is largely switched off, so that no additional energy for heating the combustion air is necessary. Both lead to a significant reduction in operating costs.

In a further possible mode of operation, it may be inadmissible at high solvent concentrations due to the energy surplus strong temperature increase in the combustion chamber space 82 come. The exhaust air purification stage 10 can therefore be designed with a bypass line. This is a part of the hot clean gas from the combustion chamber space 82 Pass the clean gas heat exchanger directly into the clean gas pipeline 86 funneled. The required amount is regulated depending on the temperature via a hot gas flap provided in the bypass line.

The exhaust air purification stage 10 Preferably, a control device is assigned, by means of which based on previously defined parameters automatic operation of the exhaust air purification stage 10 (Control / regulation of the fluid flows and temperatures, control of the damper actuators) can be carried out. The control and control parameters are z. B. set during commissioning. The controller can control the exhaust air purification stage 10 for example, operated fully automatically, with z. B. all essential operating data can be displayed via a display device.

The operation of the exhaust air purification stage 10 can via a connected to the controller process visualization, eg. As a touch screen, panel). The memory controller can also be designed as part of a controller, which at the same time also at least one further unit or auxiliary unit of the overall system, in particular z. B. a further conditioning stage 07 ; 08 and / or a memory 24 , assigned. The control device can be used for data transmission with superordinate or sibling controls of the entire system in a local network, eg. B. Ethernet, the printing press 01 or printing press system 01 to be involved.

In the described first embodiment variant, wherein as the raw gas of the dryer exhaust air stream 15 without previous process stage of the exhaust air purification stage 10 is fed, the exhaust gas is still at an elevated temperature level, so that the oxidation of the hydrocarbons contained little or even in autothermal phase of operation even no energy must be supplied. In an advantageous variant, even a return of heat energy contained in the clean gas in a hot storage ( 24 ) intended. However, no raw materials are recovered in this embodiment.

In a second embodiment, the exhaust air purification stage 10 in the dryer exhaust gas stream 15 as a recovery device 07 trained conditioning device 07 upstream of the coarse separation of hydrocarbons, which at least one, for example, but at most two series-connected separation stages 88 ; 89 , z. B. in the form of heat exchangers 88 ; 89 , having. For example, in this embodiment, only one or it can serially two with fresh air acting as a cooling fluid (r) heat exchanger 88 ; 89 or separation stages 88 ; 89 from the dryer exhaust air stream 15 be through. It can also be a first heat exchanger 88 or a first separation stage 88 with fresh air and serially a second heat exchanger 89 or a second separation stage 89 be provided with coolant as cooling fluid. Each stage can also serially several, through the same cooling fluid operated heat exchanger 88 ; 89 include. One or two stages of separation 88 . 89 can a droplet separator 92 be downstream, in which the now partially cooled dryer exhaust gas is freed of moisture. The on the cool surfaces on the exhaust side of the / the heat exchanger 88 ; 89 For example, a precipitating oil / water mixture becomes an oil separator 93 zugefuhrt, in which the oil to be recovered or solvent is separated from the water and both can be recycled. Depending on the size of the dryer exhaust stream 15 For example, several of these series can be arranged parallel to one another from one or two separation stages and, if appropriate, a droplet separator, wherein the incoming dryer waste gas stream 15 then divides accordingly and at the end of the conditioning 07 be summed up again. In this -. B. in series one or a maximum of two separation stages 88 ; 89 Having execution - the exhaust gas is not yet cooled too far and / or the hydrocarbon concentration is not lowered so far, so that in the subsequent thermal exhaust air purification stage 10 one for oxidation over the burner 83 limits the amount of energy to be supplied. A heat exchanger operated with cooling fluid 89 in this case, the coolant from the above-mentioned cold machine 06 receive.

In a -. B. predominantly the recycling of material from the dryer exhaust air stream 15 Priority metering variant of the second embodiment is at least two, preferably at least three of the abovementioned separation stages 88 . 89 ; 91 - In each case with one or more serially arranged heat exchangers - serially provided, wherein at least one of the separation steps 88 ; 89 . 91 operated at below ambient temperature (eg., Below 20 ° C) lying coolant. Several of such series may be provided parallel to each other as set forth above.

In an advantageous variant of first or second embodiments -. B. in the event that the directly from the dryer 03 or from the conditioning device 07 coming dryer exhaust air stream 15 . 15.1 has a low hydrocarbon concentration and / or low temperature, the thermal exhaust air purification stage 10 as a concentration device 08 trained conditioning device 08 be upstream. The directly from the dryer 03 or from the recovery device 07 originating dryer exhaust air stream 15 ; 15.1 in this case is in contact with an adsorber material 94 brought, which adsorbs the hydrocarbons contained in the gas stream. The thus cleaned dryer exhaust air stream 15 ; 15.1 leaves after cleaning the concentrator 08 as a clean gas stream 97 , The loaded adsorber material 94 is made by contact with one of the dryer exhaust air stream 15 ; 15.1 different fluid flow 96 , z. B. desorption stream 96 , freed from the hydrocarbons. The z. B. gaseous fluid stream 96 points opposite to the dryer exhaust air flow 15 ; 15.1 a higher temperature and a much lower flow, z. B. a maximum of half, in particular a maximum of one quarter of the Trocknerabluftstroms 15 ; 15.1 accordingly, on. As a result, the dryer exhaust air flow 15 ; 15.1 released from the hydrocarbon load, the desorption stream 96 loaded hereby. The desorption current 96 becomes in contact with the adsorber material 94 by a heating medium 74 , z. B. an air heater 74 , heated up. The desorption current 96 can basically a part of the incoming dryer exhaust air stream 15 ; 15.1 or the exiting clean gas flow 97 or possibly also be formed by fresh air from the environment. The desorption current 96 can in the heating medium 74 heated and finally as a concentrated Dryer exhaust air stream 15.2 from the concentration device 08 be discharged. However, an embodiment is advantageous, wherein a part of the desorption stream 96 in the circulation with adsorber material 94 and heating means 74 and another part of this cycle as a concentrated dryer exhaust stream 15.2 is discharged, with a proportion corresponding to the discharged portion z. B. from the dryer exhaust stream 15 ; 15.1 , the clean gas stream 97 , from the environment or from a hot storage ( 24 ) is supplied.

In an advantageous embodiment, the heating means 74 by a from a heat storage, for. As the above, by the exhaust gas of the power-heat engine 09 fed hot storage 24 , heated. The heating medium 74 then make a consumer 74 of heat in the above sense dar. In a variant, instead of the heating medium 74 a price point 74 for one out of memory 24 be provided starting hot gas, this feed point as a direct consumer 74 you can see.

The adsorber material 94 , z. As a hydrophobic zeolite, is here preferably on a rotor 98 as adsorber 98 arranged or shaped as such. The rotating or rotatable adsorber 98 is for example in a space-fixed part with the area to be cleaned dryer exhaust stream 15 ; 15.1 in contact. For example, the circular disk or annular adsorber 98 on a space-fixed area of the dryer exhaust air stream 15 ; 15.1 flows through. In another, z. B. smaller space-fixed area of the adsorber 98 this stands with the desorption stream 96 in contact. The two regions may be so delimited from each other, so that a passage of at least the fluid of the desorption stream 96 in the area of the clean gas flow 97 prevented, but at least impeded. This can be done, for example, by being as close as possible to the adsorber 97 adjacent separating elements and / or be realized by a relation to the adsorption prevailing vacuum in the desorption. In the version with rotating adsorber 98 can the concentration device 08 be continuously operated or be.

In a simpler embodiment, the adsorber 98 be arranged fixed and immovable, wherein alternately adsorbing and desorbing in - except for the areas - each of the above-mentioned type takes place. However, two such adsorbers are preferably for the possibility of a total continuous operation 94 provided in separate chambers, which are operated alternately for desorption and desorption.

The through the adsorber 94 purified clean gas stream 97 is either z. B. a fireplace to the environment, or at a sufficiently high temperature (eg., At least 150 °) a heat storage ( 24 ) and / or for heating the heating medium 74 used.

The concentrated dryer exhaust air stream 15.2 now becomes an oxidatively effective exhaust air purification stage 10 , z. B. a thermal exhaust air purification stage 10 supplied as described above.

Alternative to the thermal exhaust air purification stage described above 10 this can also purely catalytic, ie without the need for addition of fuel through a burner 83 , be executed. In this case, at least one, for example, easily accessible and exchangeable portion of the material in the through-flow chamber (s) 78 ; 79 ; 81 and / or in the cathedral 82 introduced material at least superficially catalytically active material. If the oxidation of a portion of the hydrocarbon in the region of the catalyst has once started, compared to a significantly lower temperature in comparison without a catalyst, then the exothermic reaction furthermore supplies the energy required to overcome the threshold energy.

The exhaust air purification stage 10 can also be designed as a mixed system, being used as a back-up or for the introduction of support energy burner 83 , However, catalyst material is also provided.

In a further embodiment of an exhaust air purification stage 10 and a memory 24 These systems can be combined with one another as a common aggregate 10 . 24 be executed. For example, for the exhaust air purification stage 10 described chambers 78 ; 79 ; 81 and to the store 24 described chambers 68 be executed in a same manner and provided in a common unit, for example, a common Dombereich means for forming interconnected and separate groups of chambers 68 ; 78 ; 79 ; 81 or separate areas for groups of chambers from the outset 68 ; 78 ; 79 ; 81 having. In addition, at least part of the chambers points 68 ; 78 ; 79 ; 81 on a same page by flaps on optionally to closing openings to a raw gas and a clean gas pipeline.

In an advantageous overall system 12 is thus for example on the input side of the dryer 03 (concerning the main energy flows) a heat storage 24 for storing excess heat to the dryer 03 integrated (eg, in parallel), through which variable energy to one or more downstream of the dryer 03 provided conditioning 07 ; 08 ; 10 is or can be shifted. In particular, it is advantageous in the case of recovery of hydrocarbons to carry out a concentration of residual pollutants to connect an efficient and small-scale exhaust air purification. In this case, the concentration can be increased by using released air in the exhaust air purification and / or in the memory 24 stored heat to be operated.

The indirectly heated dryer system and / or an above-mentioned design for the generation, storage and / or use of energy in the overall system are particularly advantageous in printing machines 01 or printing press systems 01 can be used to a greater extent.

In particular, the use of the above-mentioned drying system and / or an above-mentioned embodiment for the generation, storage and / or use of energy is advantageous in a printing machine system 01 with several, z. B. at least three, printing press lines for the illustration or commercial printing with a substantially vertical web run. In this case, the printing press lines each line a plurality of horizontally one behind the other from a web to be printed 11 continuous printing units 02 as well as a dryer 03 on. The printing units are in this case z. B. formed as so-called. I-printing units with two vertically stacked interacting printing units. The majority of such printing press lines and the plurality of dryers 03 requires increased demand for energy in a variety of forms, with surplus or heat energy being available on an increased scale. Of particular advantage is the integration of an above-mentioned embodiment for the generation, storage and / or use of energy for an embodiment of, or at least one of the printing press lines with printing units 02 , which are designed for waterless offset printing, ie with printing units, which are formed without dampeners.

Particular advantages also result in connection with an embodiment of a printing press 01 or printing press system 01 which several as printing towers 02 trained printing units 02 having. Here are several lanes simultaneously 11 printed simultaneously and one or z. B. also several tracks 11 dried. The printing towers 02 in this case have vertically on top of each other several pressure points, through which a substantially vertically through the printing tower 02 guided train 11 printed on both sides in multiple colors. Again, an execution of the generation, storage and / or use of energy in conjunction with a printing press 01 , in particular newspaper printing press, advantageous, wherein one or more of the printing towers 02 are executed with printing units for waterless offset printing, ie with printing units, which are formed without dampeners. This printing press is also distinguished by the fact that webs originating from several printing towers 11 together a folder 04 be fed or zugefuhrt be.

LIST OF REFERENCE NUMBERS

01

Machine, printing machine, printing press system

02

Printing unit, printing tower, aggregates

03

Dryer, hot air dryer, aggregate, consumer (heat)

04

Processing stage, folder, thermal energy aggregates

05

Heating unit, aggregate, auxiliary unit, customer

06

Cooling unit, chiller, absorption cold machine, aggregate, auxiliary unit

07

Conditioning device, aggregate, accessory, recovery device

08

Conditioning device, aggregate, accessory, concentrator

09

Heat source, combined heat and power unit, internal combustion engine, aggregate, auxiliary unit

10

Conditioning device, aggregate, accessory, exhaust air purification stage

11

Substrate, substrate web

12

overall system

13

Medium flow, heating fluid flow, exhaust gas flow, exhaust air flow, loading flow

14

supply air flow

15

Dryer exhaust air stream

16

heat exchangers

17

Heizfluidzustrom

18

dryer influx

19

supply air flow

20

Heat exchanger, steam generator

21

heat exchangers

22

Heizfluidzustrom

23

dryer influx

24

Energy storage, heat storage, storage

25

Heizfluidabstrom

26

Fluid flow, hot air flow

27

actuator

28

sensor

29

bypass

30

Fluid flow, water, aqueous fluid

31

actuator

32

actuator

33

Entrance side ( 03 )

34

Exit side ( 03 )

35

inlet opening

36

Zone, heating zone

37

Zone, cooling zone

38

narrowing

39

Dryer exhaust air stream

40

fluid line

41

fan

42

outlet opening

43

Frischlufteinritt

44

fan

45

Heizfluidabstrom

46

bypass

47

actuator

48

actuator

49

sensor

50

51

partial flow

52

outlet tunnel

53

sealing air

54

Building heating, consumers (heat)

55

Energy transfer means

56

Steam generators, consumers (heat)

57

Component, consumer (heat)

58

Building air conditioning, consumers (cold)

59

Component (tempered), consumer (cold)

60

61

Cooling device, consumer (cold)

62

Heat exchangers, consumers (cold)

63

branching point

64

storage means

65

Entladeabstrom

66

Ladeabstrom

67

Entladezustrom

68

Storage element, chamber, container

69

Room, cathedral

70

71

pipeline

72

pipe work

73

Blower, fan

74

Heating medium, air heater, consumer (heat)

75

Butterfly valves

76

pipeline

77

78

chamber

79

chamber

80

81

chamber

82

Room, cathedral, combustion chamber room

83

burner

84

pipeline

85

Actuator, flap

86

pipeline

87

fan

88

Separation stages, heat exchangers

89

Separation stages, heat exchangers

90

91

Separation stages, heat exchangers

92

Tropfchenabscheider

93

oil separator

94

adsorber

95

96

Fluid flow, air flow, desorption flow

97

Clean gas flow

98

13.1

Heizfluidteilstrom

13.2

Heizfluidteilstrom, loading inflow (hot)

13.2a

Heizfluidrestteilstrom, loading flow

13.2b

Heizfluidbypassstrom

Claims (20)

Printing machine with at least one printing unit ( 02 ), through which a printing substrate ( 11 ) can be printed on one or both sides in one or more colors, and a dryer system with a dryer ( 03 ) through which the printing substrate ( 11 ), and when passing through it to bring it to dry in the interior of the dryer, it can be brought into contact with hot dryer feed air, at least one first heat exchanger being used for heating the dryer supply air ( 16 ) is provided, through which on the cold side at least a part of the dryer ( 03 ) to leading dryer supply air as supply air ( 14 ), and on the hot side in the heat exchanger ( 16 ) Heat is conducted to the dryer to be heated supplying, different from a dryer exhaust heating fluid, characterized in that the dryer ( 03 ) at least one heating zone ( 36 ) and at least one to the heating zone ( 36 ) in the downstream direction of the Bedruckstoffweges lying cooling zone ( 37 ), that the cooling zone ( 37 ) via a second dryer feed ( 23 ) Is supplied to a second temperature dryer, which is lower than the temperature of the dryer supply the at least one heating zone ( 36 ), and by the first heat exchanger ( 16 ) heated dryer inlet of a heating zone ( 36 ) of the dryer ( 03 ) and that a blower exhaust air stream ( 39 ) from the cooling zone ( 37 ) in total or at least partially the heat exchanger ( 16 ) as supply air flow ( 14 ) or at least as part of the supply air flow ( 14 ) is supplied. Printing machine according to claim 1, characterized in that the heat exchanger ( 16 ; 21 ) leaving the dryer to the dryer ( 03 ) without a heat exchanger ( 16 ; 21 ) is supplied downstream combustion process Printing machine according to claim 1, characterized in that in the heat exchanger ( 16 ; 21 ) to be heated stream of dryer supply contains no or at least no major proportion of originating from the dryer inside dryer exhaust air. Printing machine according to claim 1, characterized in that the heat transfer from the heating fluid to the dryer supply air via at least one of the two heat exchanger ( 16 ; 21 ) is designed to be controllable on the cold and hot side passing through volume flows, in particular via the volume flow of the heating fluid. Printing machine according to one or more of claims 1 to 4, that the first heat exchanger ( 16 ) fed at least partially from the interior of the dryer ( 03 ), in particular from a cooling zone ( 37 ) or one of the cooling zones ( 37 ) upstream zone ( 36 ). Printing machine according to claim 1, characterized in that the at least one cooling zone ( 37 ) to be supplied before entering the cooling zone ( 37 ) through a second heat exchanger ( 21 ) in which it is thermally contacted with a hot side of the heat exchanger ( 21 ) flowing through heating fluid can be heated above ambient temperature. Printing machine according to claim 6, characterized in that the heat transfer from the heating fluid to the dryer supply via at least one of the two volume flows, in particular via the volume flow of the heating fluid, is controllably formed. Printing machine according to claim 6, characterized in that the heating fluid of the first and second heat exchanger ( 16 ; 21 ) from the same Heizfluidstrom ( 13 ), in particular the same heat source ( 09 ) springs. Printing machine according to one of claims 1 to 8, characterized in that in the region of an exit side ( 34 ) of the dryer ( 03 ) an outlet tunnel ( 52 ) is provided with a drawn from the front wall of the dryer housing to the outside region of reduced cross-section, which at the dryer-distal end, the ultimately effective outlet opening ( 42 ) for the substrate ( 11 ) having. Printing machine according to one of claims 6 or 9, characterized in that a fluid line is provided, through which in the second heat exchanger ( 21 ) preheated dryer inlet into a region of the outlet opening ( 42 ) of the dryer ( 03 ) can be fed. Printing machine according to one or more of claims 1 to 10, characterized in that the one or more heat exchangers ( 16 ; 21 ) supplied to the dryer system heating fluid at least partially exhaust air or exhaust gas of a combined heat and power unit ( 09 ). Printing machine according to one or more of claims 1 to 11, characterized in that the one or more heat exchangers ( 16 ; 21 ) heating fluid supplied to the dryer system comprises steam or is formed by steam, which upstream of the heat exchanger or heat exchangers ( 16 ; 21 ) in a heat exchanger ( 20 ) by heat exchange with exhaust air or exhaust gas of a combined heat and power unit ( 09 ) is generated. Printing machine according to claim 11 or 12, characterized in that parallel to the supply of the exhaust air or the exhaust gas from the combined heat and power unit ( 09 ) to the one or more heat exchangers ( 16 ; 21 ) of the dryer system and / or to the steam-providing heat exchanger ( 20 ) a supply line to at least one other of a dryer ( 03 ) different customers ( 05 ; 06 ) and / or consumers ( 54 ; 56 ; 57 ; 74 ) of heat is provided. Printing machine according to claim 12 or 13, characterized in that the output side of the steam-providing heat exchanger ( 20 ) a fluid line is provided, through which a heat exchanger ( 20 ) leaving stream of exhaust air or exhaust gas from the combined heat and power unit ( 09 ) to at least one other of a dryer ( 03 ) different customers ( 05 ; 06 ) and / or consumers ( 54 ; 56 ; 57 ; 74 ) can be supplied by heat. Method for operating a dryer ( 03 ) of a printing material web processing and / or processing printing machine, wherein at least one heating zone ( 36 ) of the dryer ( 03 ) is acted upon by a heated dryer inlet of a first temperature (T36), characterized in that a heating of the dryer inlet before entering the at least one heating zone ( 36 ) by direct or indirect heat exchange with a gaseous or liquid Fluid of a media stream ( 13 ), which has a significantly higher temperature than the environment and as a by-product or effluent from the dryer ( 03 ) different aggregate or accessory ( 09 ) of the printing machine ( 01 ) leaves the dryer ( 03 ) at least one heating zone ( 36 ) and at least one to the heating zone ( 36 ) in the downstream direction of the Bedruckstoffweges lying cooling zone ( 37 ), that the cooling zone ( 37 ) Is supplied to a dryer feed air to a second temperature (T37), which is lower than the temperature (T36) of the dryer supply of the at least one heating zone ( 36 ), that through the first heat exchanger ( 16 ) heated dryer inlet of the first temperature (T36) of a heating zone ( 36 ) of the dryer ( 03 ), and that a dryer exhaust air stream ( 39 ) from at least one of the cooling zone ( 37 ) in total or at least partially the first heat exchanger ( 16 ) as supply air flow ( 14 ) or at least as part of the supply air flow ( 14 ) is supplied. Method according to claim 15, characterized in that at least one cooling zone ( 37 ) of the dryer ( 03 ) is acted upon with heated dryer supply, wherein a heating of the dryer supply air before entering the at least one cooling zone ( 37 ) takes place indirectly by heat exchange with a heating fluid, wherein in at least the first mode of operation as a heating fluid or at least as part of the heating fluid, a gaseous or liquid fluid of a media flow ( 13 ) which has a significantly higher temperature than the environment and as a by-product or effluent from the dryer ( 03 ) Various aggregate or ancillary unit of the printing press ( 01 ) leaves. A method according to claim 15 and 16, characterized in that at least a majority of the in the at least one heating zone ( 36 ) previously supplied from a heating and / or cooling zone ( 36 ; 37 ) of the dryer ( 03 ) is removed and heated by heat exchange. A method according to claim 15 or 16, characterized in that the heat exchange directly with exhaust gas as a combustion engine ( 09 ) trained accessory ( 09 ) of the printing machine ( 01 ) takes place as heating fluid. A method according to claim 15 or 16, characterized in that the heat exchange indirectly with exhaust gas as an internal combustion engine ( 09 ) trained accessory ( 09 ) of the printing machine ( 01 ) takes place as a heating fluid by the exhaust gas in a first heat exchange, a different fluid from the exhaust gas, and is heated by heat exchange with this fluid to be heated dryer inlet. Method according to one or more of claims 15 to 19, characterized in that in the first mode of operation parallel to the heat exchange with the dryer supply air, a partial flow of the exhaust gas from the dryer ( 03 ) different customers or consumers of heat and / or a heat storage ( 24 ) is supplied.

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